CVE-2011-4966 describes a vulnerability in FreeRADIUS before version 2.2.0, specifically within the modules/rlm_unix/rlm_unix.c component. When Unix authentication mode is enabled, the software fails to properly check password expiration in /etc/shadow, allowing remote authenticated users to bypass expiration policies and authenticate with an expired password. This vulnerability has a CVSS score of 6.0, indicating a medium severity with potential for partial confidentiality, integrity, and availability impact (C:P/I:P/A:P) via a network attack requiring authentication (AV:N/AC:M/Au:S). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:freeradius:freeradius:*:*:*:*:*:*:*:* | ||
<= 2.2.0CPE matchmatch criteria | cpe:2.3:a:freeradius:freeradius:*:*:*:*:*:*:*:* | ||
0.1CPE matchmatch criteria | cpe:2.3:a:freeradius:freeradius:0.1:*:*:*:*:*:*:* | ||
0.2CPE matchmatch criteria | cpe:2.3:a:freeradius:freeradius:0.2:*:*:*:*:*:*:* | ||
0.3CPE matchmatch criteria | cpe:2.3:a:freeradius:freeradius:0.3:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:M/Au:S/C:P/I:P/A:P
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
modules/rlm_unix/rlm_unix.c in FreeRADIUS before 2.2.0, when unix mode is enabled for user authentication, does not properly check the password expiration in /etc/shadow, which allows remote authenticated users to authenticate using an expired password.
Mar 2, 2013freeradius: does not respect expired passwords when using the unix module
Nov 14, 2011